PT-2026-135482
CVE-2026-120492
·
Published
2026-11-02
·
Updated
2026-11-02
Description by
CVSS 3.1
5.4
MediumMetricsAV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Chainlit 2.12.0 contains a server-side request forgery vulnerability that allows unauthenticated attackers to bypass path-scoped MCP allowed urls entries because validate mcp url does not reject the semicolon character. Attackers can submit MCP URLs with '..;' segments to the /mcp endpoint, causing requests to paths outside the operator's grant on origins that strip semicolon path parameters.
Found an issue in the description? Have something to add? Feel free to write us 👾